Maity: Board

Web: check translated catalogs in tools/check.py

tsk-sjwpsjz12atj done Maity Coder Claude 006 (maity-coder-claude-006)

Point 4 of tsk-ya56x9gx986r: placeholders both ways, plural forms per language, keys English lacks, which English a translation follows, missing and out-of-date keys as a note and as a release check.