diff --git a/build.gradle b/build.gradle
index 7f343cc56..aa15a749c 100755
--- a/build.gradle
+++ b/build.gradle
@@ -9,8 +9,6 @@ plugins {
     id 'org.asciidoctor.jvm.convert'
 }
 
-apply plugin: 'checkstyle'
-
 group 'com.crowdin'
 version '3.15.0'
 
@@ -133,35 +131,8 @@ spotbugsTest {
     } as Closure<NamedDomainObjectContainer<? extends SpotBugsReport>>))
 }
 
-checkstyle {
-    toolVersion '9.3'
-    configFile file("config/checkstyle/checkstyle.xml")
-}
-checkstyleMain {
-    onlyIf {project.hasProperty('staticAnalysisMarker')}
-    source ='src/main/java'
-    reports(({
-        html {
-            required = true
-            destination = file("$buildDir/reports/staticAnalysis/checkstyle-main.html")
-        }
-        xml.required = false
-    }))
-}
-checkstyleTest {
-    onlyIf {project.hasProperty('staticAnalysisMarker')}
-    source ='src/test/java'
-    reports(({
-        html {
-            required = true
-            destination = file("$buildDir/reports/staticAnalysis/checkstyle-test.html")
-        }
-        xml.required = false
-    }))
-}
-
 task staticAnalysis(type: GradleBuild) {
-    tasks = ['checkstyleMain', 'checkstyleTest', 'spotbugsMain', 'spotbugsTest']
+    tasks = ['spotbugsMain', 'spotbugsTest']
 }
 
 task generateManpageAsciiDoc(type: JavaExec) {
diff --git a/config/checkstyle/checkstyle.xml b/config/checkstyle/checkstyle.xml
deleted file mode 100644
index 92abcc59f..000000000
--- a/config/checkstyle/checkstyle.xml
+++ /dev/null
@@ -1,333 +0,0 @@
-<?xml version="1.0"?>
-<!DOCTYPE module PUBLIC
-        "-//Checkstyle//DTD Checkstyle Configuration 1.3//EN"
-        "https://checkstyle.org/dtds/configuration_1_3.dtd">
-
-<!--
-    Checkstyle configuration that checks the Google coding conventions from Google Java Style
-    that can be found at https://google.github.io/styleguide/javaguide.html
-
-    Checkstyle is very configurable. Be sure to read the documentation at
-    http://checkstyle.org (or in your downloaded distribution).
-
-    To completely disable a check, just comment it out or delete it from the file.
-    To suppress certain violations please review suppression filters.
-
-    Authors: Max Vetrenko, Ruslan Diachenko, Roman Ivanov.
- -->
-
-<module name = "Checker">
-    <property name="charset" value="UTF-8"/>
-
-    <property name="severity" value="warning"/>
-
-    <property name="fileExtensions" value="java, properties, xml"/>
-    <!-- Excludes all 'module-info.java' files              -->
-    <!-- See https://checkstyle.org/config_filefilters.html -->
-    <module name="BeforeExecutionExclusionFileFilter">
-        <property name="fileNamePattern" value="module\-info\.java$"/>
-    </module>
-    <!-- https://checkstyle.org/config_filters.html#SuppressionFilter -->
-    <module name="SuppressionFilter">
-        <property name="file" value="${org.checkstyle.google.suppressionfilter.config}"
-                  default="checkstyle-suppressions.xml" />
-        <property name="optional" value="true"/>
-    </module>
-
-    <!-- Checks for whitespace                               -->
-    <!-- See http://checkstyle.org/config_whitespace.html -->
-    <module name="FileTabCharacter">
-        <property name="eachLine" value="true"/>
-    </module>
-
-    <module name="LineLength">
-        <property name="fileExtensions" value="java"/>
-        <property name="max" value="150"/>
-        <property name="ignorePattern" value="^package.*|^import.*|a href|href|http://|https://|ftp://"/>
-    </module>
-
-    <module name="TreeWalker">
-        <module name="OuterTypeFilename"/>
-        <module name="IllegalTokenText">
-            <property name="tokens" value="STRING_LITERAL, CHAR_LITERAL"/>
-            <property name="format"
-                      value="\\u00(09|0(a|A)|0(c|C)|0(d|D)|22|27|5(C|c))|\\(0(10|11|12|14|15|42|47)|134)"/>
-            <property name="message"
-                      value="Consider using special escape sequence instead of octal value or Unicode escaped value."/>
-        </module>
-<!--        <module name="AvoidEscapedUnicodeCharacters">-->
-<!--            <property name="allowEscapesForControlCharacters" value="true"/>-->
-<!--            <property name="allowByTailComment" value="true"/>-->
-<!--            <property name="allowNonPrintableEscapes" value="true"/>-->
-<!--        </module>-->
-        <module name="AvoidStarImport"/>
-        <module name="OneTopLevelClass"/>
-<!--        <module name="NoLineWrap">-->
-<!--            <property name="tokens" value="PACKAGE_DEF, IMPORT, STATIC_IMPORT"/>-->
-<!--        </module>-->
-        <module name="EmptyBlock">
-            <property name="option" value="TEXT"/>
-            <property name="tokens"
-                      value="LITERAL_TRY, LITERAL_FINALLY, LITERAL_IF, LITERAL_ELSE, LITERAL_SWITCH"/>
-        </module>
-        <module name="NeedBraces">
-            <property name="tokens"
-                      value="LITERAL_DO, LITERAL_ELSE, LITERAL_FOR, LITERAL_IF, LITERAL_WHILE"/>
-        </module>
-        <module name="LeftCurly">
-            <property name="tokens"
-                      value="ANNOTATION_DEF, CLASS_DEF, CTOR_DEF, ENUM_CONSTANT_DEF, ENUM_DEF,
-                    INTERFACE_DEF, LAMBDA, LITERAL_CASE, LITERAL_CATCH, LITERAL_DEFAULT,
-                    LITERAL_DO, LITERAL_ELSE, LITERAL_FINALLY, LITERAL_FOR, LITERAL_IF,
-                    LITERAL_SWITCH, LITERAL_SYNCHRONIZED, LITERAL_TRY, LITERAL_WHILE, METHOD_DEF,
-                    OBJBLOCK, STATIC_INIT"/>
-        </module>
-        <module name="RightCurly">
-            <property name="id" value="RightCurlySame"/>
-            <property name="tokens"
-                      value="LITERAL_TRY, LITERAL_CATCH, LITERAL_FINALLY, LITERAL_IF, LITERAL_ELSE,
-                    LITERAL_DO"/>
-        </module>
-        <module name="RightCurly">
-            <property name="id" value="RightCurlyAlone"/>
-            <property name="option" value="alone"/>
-            <property name="tokens"
-                      value="CLASS_DEF, METHOD_DEF, CTOR_DEF, LITERAL_FOR, LITERAL_WHILE, STATIC_INIT,
-                    INSTANCE_INIT, ANNOTATION_DEF, ENUM_DEF, INTERFACE_DEF"/>
-        </module>
-        <module name="SuppressionXpathSingleFilter">
-            <!-- suppresion is required till https://github.com/checkstyle/checkstyle/issues/7541 -->
-            <property name="id" value="RightCurlyAlone"/>
-            <property name="query" value="//RCURLY[parent::SLIST[count(./*)=1]
-                                                 or preceding-sibling::*[last()][self::LCURLY]]"/>
-        </module>
-        <module name="WhitespaceAfter">
-            <property name="tokens"
-                      value="COMMA, SEMI, TYPECAST, LITERAL_IF, LITERAL_ELSE,
-                    LITERAL_WHILE, LITERAL_DO, LITERAL_FOR, DO_WHILE"/>
-        </module>
-        <module name="WhitespaceAround">
-            <property name="allowEmptyConstructors" value="true"/>
-            <property name="allowEmptyLambdas" value="true"/>
-            <property name="allowEmptyMethods" value="true"/>
-            <property name="allowEmptyTypes" value="true"/>
-            <property name="allowEmptyLoops" value="true"/>
-            <property name="tokens"
-                      value="ASSIGN, BAND, BAND_ASSIGN, BOR, BOR_ASSIGN, BSR, BSR_ASSIGN, BXOR,
-                    BXOR_ASSIGN, COLON, DIV, DIV_ASSIGN, DO_WHILE, EQUAL, GE, GT, LAMBDA, LAND,
-                    LCURLY, LE, LITERAL_CATCH, LITERAL_DO, LITERAL_ELSE, LITERAL_FINALLY,
-                    LITERAL_FOR, LITERAL_IF, LITERAL_RETURN, LITERAL_SWITCH, LITERAL_SYNCHRONIZED,
-                     LITERAL_TRY, LITERAL_WHILE, LOR, LT, MINUS, MINUS_ASSIGN, MOD, MOD_ASSIGN,
-                     NOT_EQUAL, PLUS, PLUS_ASSIGN, QUESTION, RCURLY, SL, SLIST, SL_ASSIGN, SR,
-                     SR_ASSIGN, STAR, STAR_ASSIGN, LITERAL_ASSERT, TYPE_EXTENSION_AND"/>
-            <message key="ws.notFollowed"
-                     value="WhitespaceAround: ''{0}'' is not followed by whitespace. Empty blocks may only be represented as '{}' when not part of a multi-block statement (4.1.3)"/>
-            <message key="ws.notPreceded"
-                     value="WhitespaceAround: ''{0}'' is not preceded with whitespace."/>
-        </module>
-        <module name="OneStatementPerLine"/>
-        <module name="MultipleVariableDeclarations"/>
-        <module name="ArrayTypeStyle"/>
-        <module name="MissingSwitchDefault"/>
-        <module name="FallThrough"/>
-        <module name="UpperEll"/>
-        <module name="ModifierOrder"/>
-        <module name="EmptyLineSeparator">
-            <property name="tokens"
-                      value="PACKAGE_DEF, IMPORT, STATIC_IMPORT, CLASS_DEF, INTERFACE_DEF, ENUM_DEF,
-                    STATIC_INIT, INSTANCE_INIT, METHOD_DEF, CTOR_DEF, VARIABLE_DEF"/>
-            <property name="allowNoEmptyLineBetweenFields" value="true"/>
-        </module>
-        <module name="SeparatorWrap">
-            <property name="id" value="SeparatorWrapDot"/>
-            <property name="tokens" value="DOT"/>
-            <property name="option" value="nl"/>
-        </module>
-        <module name="SeparatorWrap">
-            <property name="id" value="SeparatorWrapComma"/>
-            <property name="tokens" value="COMMA"/>
-            <property name="option" value="EOL"/>
-        </module>
-        <module name="SeparatorWrap">
-            <!-- ELLIPSIS is EOL until https://github.com/google/styleguide/issues/258 -->
-            <property name="id" value="SeparatorWrapEllipsis"/>
-            <property name="tokens" value="ELLIPSIS"/>
-            <property name="option" value="EOL"/>
-        </module>
-        <module name="SeparatorWrap">
-            <!-- ARRAY_DECLARATOR is EOL until https://github.com/google/styleguide/issues/259 -->
-            <property name="id" value="SeparatorWrapArrayDeclarator"/>
-            <property name="tokens" value="ARRAY_DECLARATOR"/>
-            <property name="option" value="EOL"/>
-        </module>
-        <module name="SeparatorWrap">
-            <property name="id" value="SeparatorWrapMethodRef"/>
-            <property name="tokens" value="METHOD_REF"/>
-            <property name="option" value="nl"/>
-        </module>
-        <module name="PackageName">
-            <property name="format" value="^[a-z]+(\.[a-z][a-z0-9]*)*$"/>
-            <message key="name.invalidPattern"
-                     value="Package name ''{0}'' must match pattern ''{1}''."/>
-        </module>
-        <module name="TypeName">
-            <property name="tokens" value="CLASS_DEF, INTERFACE_DEF, ENUM_DEF, ANNOTATION_DEF"/>
-            <message key="name.invalidPattern"
-                     value="Type name ''{0}'' must match pattern ''{1}''."/>
-        </module>
-        <module name="MemberName">
-            <property name="format" value="^[a-z][a-z0-9][a-zA-Z0-9]*$"/>
-            <message key="name.invalidPattern"
-                     value="Member name ''{0}'' must match pattern ''{1}''."/>
-        </module>
-        <module name="ParameterName">
-            <property name="format" value="^[a-z]([a-z0-9][a-zA-Z0-9]*)?$"/>
-            <message key="name.invalidPattern"
-                     value="Parameter name ''{0}'' must match pattern ''{1}''."/>
-        </module>
-        <module name="LambdaParameterName">
-            <property name="format" value="^[a-z]([a-z0-9][a-zA-Z0-9]*)?$"/>
-            <message key="name.invalidPattern"
-                     value="Lambda parameter name ''{0}'' must match pattern ''{1}''."/>
-        </module>
-        <module name="CatchParameterName">
-            <property name="format" value="^[a-z]([a-z0-9][a-zA-Z0-9]*)?$"/>
-            <message key="name.invalidPattern"
-                     value="Catch parameter name ''{0}'' must match pattern ''{1}''."/>
-        </module>
-        <module name="LocalVariableName">
-            <property name="format" value="^[a-z]([a-z0-9][a-zA-Z0-9]*)?$"/>
-            <message key="name.invalidPattern"
-                     value="Local variable name ''{0}'' must match pattern ''{1}''."/>
-        </module>
-        <module name="ClassTypeParameterName">
-            <property name="format" value="(^[A-Z][0-9]?)$|([A-Z][a-zA-Z0-9]*[T]$)"/>
-            <message key="name.invalidPattern"
-                     value="Class type name ''{0}'' must match pattern ''{1}''."/>
-        </module>
-        <module name="MethodTypeParameterName">
-            <property name="format" value="(^[A-Z][0-9]?)$|([A-Z][a-zA-Z0-9]*[T]$)"/>
-            <message key="name.invalidPattern"
-                     value="Method type name ''{0}'' must match pattern ''{1}''."/>
-        </module>
-        <module name="InterfaceTypeParameterName">
-            <property name="format" value="(^[A-Z][0-9]?)$|([A-Z][a-zA-Z0-9]*[T]$)"/>
-            <message key="name.invalidPattern"
-                     value="Interface type name ''{0}'' must match pattern ''{1}''."/>
-        </module>
-        <module name="NoFinalizer"/>
-        <module name="GenericWhitespace">
-            <message key="ws.followed"
-                     value="GenericWhitespace ''{0}'' is followed by whitespace."/>
-            <message key="ws.preceded"
-                     value="GenericWhitespace ''{0}'' is preceded with whitespace."/>
-            <message key="ws.illegalFollow"
-                     value="GenericWhitespace ''{0}'' should followed by whitespace."/>
-            <message key="ws.notPreceded"
-                     value="GenericWhitespace ''{0}'' is not preceded with whitespace."/>
-        </module>
-        <module name="Indentation">
-            <property name="basicOffset" value="4"/>
-            <property name="braceAdjustment" value="0"/>
-            <property name="caseIndent" value="4"/>
-            <property name="throwsIndent" value="4"/>
-            <property name="lineWrappingIndentation" value="4"/>
-            <property name="arrayInitIndent" value="4"/>
-        </module>
-        <module name="AbbreviationAsWordInName">
-            <property name="ignoreFinal" value="false"/>
-            <property name="allowedAbbreviationLength" value="1"/>
-            <property name="tokens"
-                      value="CLASS_DEF, INTERFACE_DEF, ENUM_DEF, ANNOTATION_DEF, ANNOTATION_FIELD_DEF,
-                    PARAMETER_DEF, VARIABLE_DEF, METHOD_DEF"/>
-        </module>
-        <module name="OverloadMethodsDeclarationOrder"/>
-<!--        <module name="VariableDeclarationUsageDistance"/>-->
-<!--        <module name="CustomImportOrder">-->
-<!--            <property name="sortImportsInGroupAlphabetically" value="true"/>-->
-<!--            <property name="separateLineBetweenGroups" value="true"/>-->
-<!--&lt;!&ndash;            <property name="customImportOrderRules" value="STATIC###THIRD_PARTY_PACKAGE"/>&ndash;&gt;-->
-<!--            <property name="tokens" value="IMPORT, STATIC_IMPORT, PACKAGE_DEF"/>-->
-<!--        </module>-->
-        <module name="MethodParamPad">
-            <property name="tokens"
-                      value="CTOR_DEF, LITERAL_NEW, METHOD_CALL, METHOD_DEF,
-                    SUPER_CTOR_CALL, ENUM_CONSTANT_DEF"/>
-        </module>
-        <module name="NoWhitespaceBefore">
-            <property name="tokens"
-                      value="COMMA, SEMI, POST_INC, POST_DEC, DOT,
-                    LABELED_STAT, METHOD_REF"/>
-            <property name="allowLineBreaks" value="true"/>
-        </module>
-        <module name="ParenPad">
-            <property name="tokens"
-                      value="ANNOTATION, ANNOTATION_FIELD_DEF, CTOR_CALL, CTOR_DEF, DOT, ENUM_CONSTANT_DEF,
-                    EXPR, LITERAL_CATCH, LITERAL_DO, LITERAL_FOR, LITERAL_IF, LITERAL_NEW,
-                    LITERAL_SWITCH, LITERAL_SYNCHRONIZED, LITERAL_WHILE, METHOD_CALL,
-                    METHOD_DEF, QUESTION, RESOURCE_SPECIFICATION, SUPER_CTOR_CALL, LAMBDA"/>
-        </module>
-        <module name="OperatorWrap">
-            <property name="option" value="NL"/>
-            <property name="tokens"
-                      value="BAND, BOR, BSR, BXOR, DIV, EQUAL, GE, GT, LAND, LE, LITERAL_INSTANCEOF, LOR,
-                    LT, MINUS, MOD, NOT_EQUAL, PLUS, QUESTION, SL, SR, STAR, METHOD_REF "/>
-        </module>
-        <module name="AnnotationLocation">
-            <property name="id" value="AnnotationLocationMostCases"/>
-            <property name="tokens"
-                      value="CLASS_DEF, INTERFACE_DEF, ENUM_DEF, METHOD_DEF, CTOR_DEF"/>
-        </module>
-        <module name="AnnotationLocation">
-            <property name="id" value="AnnotationLocationVariables"/>
-            <property name="tokens" value="VARIABLE_DEF"/>
-            <property name="allowSamelineMultipleAnnotations" value="true"/>
-        </module>
-        <module name="NonEmptyAtclauseDescription"/>
-        <module name="InvalidJavadocPosition"/>
-        <module name="JavadocTagContinuationIndentation"/>
-        <module name="SummaryJavadoc">
-            <property name="forbiddenSummaryFragments"
-                      value="^@return the *|^This method returns |^A [{]@code [a-zA-Z0-9]+[}]( is a )"/>
-        </module>
-        <module name="JavadocParagraph"/>
-        <module name="AtclauseOrder">
-            <property name="tagOrder" value="@param, @return, @throws, @deprecated"/>
-            <property name="target"
-                      value="CLASS_DEF, INTERFACE_DEF, ENUM_DEF, METHOD_DEF, CTOR_DEF, VARIABLE_DEF"/>
-        </module>
-        <module name="JavadocMethod">
-            <property name="accessModifiers" value="public"/>
-            <property name="allowMissingParamTags" value="true"/>
-            <property name="allowMissingReturnTag" value="true"/>
-            <property name="allowedAnnotations" value="Override, Test"/>
-            <property name="tokens" value="METHOD_DEF, CTOR_DEF, ANNOTATION_FIELD_DEF"/>
-        </module>
-<!--        <module name="MissingJavadocMethod">-->
-<!--            <property name="scope" value="public"/>-->
-<!--            <property name="minLineCount" value="2"/>-->
-<!--            <property name="allowedAnnotations" value="Override, Test"/>-->
-<!--            <property name="tokens" value="METHOD_DEF, CTOR_DEF, ANNOTATION_FIELD_DEF"/>-->
-<!--        </module>-->
-        <module name="MethodName">
-            <property name="format" value="^[a-z][a-z0-9][a-zA-Z0-9_]*$"/>
-            <message key="name.invalidPattern"
-                     value="Method name ''{0}'' must match pattern ''{1}''."/>
-        </module>
-        <module name="SingleLineJavadoc">
-            <property name="ignoreInlineTags" value="false"/>
-        </module>
-        <module name="EmptyCatchBlock">
-            <property name="exceptionVariableName" value="expected"/>
-        </module>
-<!--        <module name="CommentsIndentation">-->
-<!--            <property name="tokens" value="SINGLE_LINE_COMMENT, BLOCK_COMMENT_BEGIN"/>-->
-<!--        </module>-->
-        <!-- https://checkstyle.org/config_filters.html#SuppressionXpathFilter -->
-        <module name="SuppressionXpathFilter">
-            <property name="file" value="${org.checkstyle.google.suppressionxpathfilter.config}"
-                      default="checkstyle-xpath-suppressions.xml" />
-            <property name="optional" value="true"/>
-        </module>
-    </module>
-</module>