@@ -47,7 +47,7 @@
 Mathematical formulas and notation are preserved by fully excluding all MathML elements from translation. All 32 MathML Core tags (such as `math`, `mi`, `mo`, `mfrac`, `msub`, `msup`, `mrow`, etc.) are recognized and excluded, ensuring mathematical expressions remain intact and unaltered.
 
 ## Improved Handling of Academic Content
-Special handling is included for academic sites and code listings. For example, code blocks on arXiv.org (`.ltx_listing`) and Reddit-specific elements (such as `faceplate-screen-reader-content > *`, `reddit-header-large *`, `shreddit-comment-action-row > *`, and `shreddit-post-flair`) are excluded from translation. These custom selectors are centrally managed for maintainability.
+Special handling is included for academic sites and code listings. For example, code blocks on arXiv.org (`.ltx_listing`), GitHub PR review diff tables (`table.diff-table`), and Reddit-specific elements (such as `faceplate-screen-reader-content > *`, `reddit-header-large *`, `shreddit-comment-action-row > *`, and `shreddit-post-flair`) are excluded from translation. These custom selectors are centrally managed for maintainability.
 
 ## Enabling Auto Translation for URL Patterns
 Auto translation is triggered for web pages whose URLs match patterns specified in the `autoTranslatePatterns` array within the `translate.page` configuration. **Domain pattern matching is precise and respects TLD boundaries:**

@@ -35,7 +35,10 @@
 - `shreddit-comment-action-row > *` - Comment action buttons
 - `shreddit-post-flair` - Post flair tags (to prevent misalignment during translation)
 
-These site-specific exclusions ensure that UI elements, navigation, and metadata are not translated, preventing visual misalignment and maintaining the intended user experience on each platform.
+For github.com, the following elements are excluded:
+- `table.diff-table` - PR review diff tables (to prevent code diffs in review comments from being translated)
+
+These site-specific exclusions ensure that UI elements, navigation, metadata, and code snippets are not translated, preventing visual misalignment and maintaining the intended user experience on each platform.
 
 **Exclusion of Structural Elements in Main Content Mode:**
 In main content mode (when `config.translate.page.range` is not set to `'all'`), top-level structural elements such as `<header>`, `<footer>`, `<nav>`, and `<aside>` are excluded from translation to avoid translating site-wide navigation and structural elements. However, when these same elements appear inside content containers like `<article>` or `<main>`, they are included in translation, as they are likely to be content-specific (such as article titles within a `<header>` inside an `<article>`).
@@ -117,7 +120,7 @@
 Additional unit tests verify that elements with the `sr-only` or `visually-hidden` classes, elements with `aria-hidden="true"`, and similar hidden elements are excluded from translation and text extraction. This ensures that only visible content is processed, preventing hidden or accessibility-only content from being translated or included in extracted text. Tests also verify that `isDontWalkIntoButTranslateAsChildElement` correctly excludes `sr-only` and `visually-hidden` elements (returning false), while `isDontWalkIntoAndDontTranslateAsChildElement` correctly identifies these elements for complete exclusion.
 
 **Site-Specific Exclusion Tests:**
-Unit tests verify that site-specific elements in the `CUSTOM_DONT_WALK_INTO_ELEMENT_SELECTOR_MAP` are correctly excluded. For www.reddit.com, tests confirm that `shreddit-post-flair` elements are identified by `isCustomDontWalkIntoElement` and excluded by `isDontWalkIntoAndDontTranslateAsChildElement`, preventing flair tag misalignment during Reddit translations.
+Unit tests verify that site-specific elements in the `CUSTOM_DONT_WALK_INTO_ELEMENT_SELECTOR_MAP` are correctly excluded. For www.reddit.com, tests confirm that `shreddit-post-flair` elements are identified by `isCustomDontWalkIntoElement` and excluded by `isDontWalkIntoAndDontTranslateAsChildElement`, preventing flair tag misalignment during Reddit translations. For github.com, tests confirm that `table.diff-table` elements are correctly identified and excluded, ensuring that PR review code snippets are not translated and maintaining the integrity of code diffs displayed in review comments.
 
 **Content Container Context Tests:**
 Unit tests verify that structural elements like `<header>`, `<footer>`, and `<nav>` are correctly excluded or included based on their context. The tests confirm that: