diff --git a/topics/intro/content_updates.md b/topics/intro/content_updates.md
index f5306a63a..b22b07fb9 100644
--- a/topics/intro/content_updates.md
+++ b/topics/intro/content_updates.md
@@ -12,6 +12,12 @@ See [GitHub Changelog](https://github.com/JetBrains/intellij-sdk-docs/commits/ma
 
 ## 2024
 
+### May
+{may-24}
+Minor Changes and Additions
+:
+- How to support [grammar checks](spell_checking.md#grammar-checks) provided by Grazie plugin in custom languages.
+
 ### April
 {april-24}
 
diff --git a/topics/reference_guide/custom_language_support/spell_checking.md b/topics/reference_guide/custom_language_support/spell_checking.md
index 8fc0e3a54..bf6c944a2 100644
--- a/topics/reference_guide/custom_language_support/spell_checking.md
+++ b/topics/reference_guide/custom_language_support/spell_checking.md
@@ -110,3 +110,27 @@ Register in `com.intellij.spellchecker.dictionary.runtimeDictionaryProvider` ext
 
 **Example**
 [`PyPackagesDictionary`](%gh-ic%/python/src/com/jetbrains/python/packaging/PyPackagesDictionary.kt)
+
+## Grammar Checks (Grazie plugin)
+{id="grammar-checks"}
+
+[Grazie Lite](https://plugins.jetbrains.com/plugin/12175-grazie-lite) (bundled) and
+[Grazie Pro](https://plugins.jetbrains.com/plugin/16136-grazie-pro/)
+plugins provide intelligent spelling and grammar checks for all texts.
+
+To use the API mentioned below, add a [dependency](plugin_dependencies.md) on plugin ID `tanvd.grazi`.
+
+### `TextExtractor`
+
+To define how to extract natural language text from PSI, implement
+[`TextExtractor`](%gh-ic%/plugins/grazie/src/main/kotlin/com/intellij/grazie/text/TextExtractor.java)
+and register in `com.intellij.grazie.textExtractor` extension point.
+
+**Example:** [`JavaTextExtractor`](%gh-ic%/plugins/grazie/java/src/main/kotlin/com/intellij/grazie/ide/language/java/JavaTextExtractor.java)
+
+### `ProblemFilter`
+
+To ignore specific reported problems, implement [`ProblemFilter`](%gh-ic%/plugins/grazie/src/main/kotlin/com/intellij/grazie/text/ProblemFilter.java)
+registered in `com.intellij.grazie.problemFilter` extension point.
+
+**Example:** [`JavadocProblemFilter`](%gh-ic%/plugins/grazie/java/src/main/kotlin/com/intellij/grazie/ide/language/java/JavadocProblemFilter.java)