Added a new Japanese translation file (ja.json) and updated all language files to include Japanese in the language selection. Updated quality label color detection in ytsage_gui_format_table.py to support Japanese terms, and registered Japanese in the default language list in ytsage_localization.py.
Added a new Arabic translation file (ar.json) and updated all other language files to include 'arabic' in the language selection list. Also updated quality label color detection in the format table to support Arabic terms, ensuring proper highlighting for quality levels in Arabic.
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