[Bug]: Editor injects redundant <span style="font-size: inherit;"> wrappers when switching input language mid-text, causing content bloat

[SMSdesign]

Operating system

Windows 11

Publii version

0.47.8

Post editor

WYSIWYG editor

Bug description

When typing in the WYSIWYG post editor and switching the OS/keyboard input language in the middle of a paragraph (e.g. Latin ↔ Cyrillic), the editor progressively wraps the newly typed text in empty-purpose tags. These accumulate with every language switch, resulting in deeply nested spans with no visual effect but significant HTML/DOM bloat in the saved post content.

Steps to reproduce

1. Create/open a post in the Publii WYSIWYG editor.
2. Start typing a sentence in one language (e.g. English).
3. Switch the system input language (e.g. to Ukrainian/Russian) without leaving the current paragraph, and continue typing.
4. Switch back and forth a few more times while continuing to type in the same paragraph.
5. Open "Source code" view for that block/post.

The underlying HTML stays clean — plain text nodes inside the paragraph, with no extra wrappers, since no font-size or other style was actually changed by the user.

Actual Result

The HTML accumulates multiple nested (sometimes also <strong style="line-height: inherit;") elements around the newly typed runs of text — one or more per language switch. On longer posts edited across multiple languages, this can add dozens of empty spans

Relevant log output