Hi,

To enable RTL layout and apply Persian/Arabic fonts across the entire Odoo 19 Community backend, the most efficient approach is to create a small custom module that loads a global CSS file through web.assets_backend, avoiding any need to edit individual modules. In this CSS file, you can apply direction: rtl and other layout adjustments to menus, forms, and control panels by targeting html[lang="ar"], html[lang="fa"], ensuring the interface automatically flips when a user selects Arabic or Persian. In the same stylesheet, define a @font-face rule for your chosen font (like Vazirmatn) and apply it to the same language selectors so the entire backend switches to the correct typography. This method keeps everything centralized, clean, and fully automatic as soon as the user changes their language.

Hope it helps

In Odoo CE 19, the simplest way to enable RTL layouts and global font changes is to build a small backend module that extends web.assets_backend and injects CSS rules. For RTL, you can check the user’s language (fa or ar) and apply direction: rtl; text-align: right; so menus and panels flip automatically. For fonts, load your preferred typeface (like Vazirmatn) and apply it globally with html[lang="fa"], html[lang="ar"] { font-family: 'Vazirmatn', sans-serif !important; }. This avoids editing templates individually and works across the backend. If you prefer ready‑made solutions, OCA repositories such as server-backend and server-tools provide backend customization patterns, while Odoo Store apps like Backend RTL and Backend Theme Customizer offer plug‑and‑play options for RTL support and font styling.