Adding the switcher in a block theme

Block themes (like Twenty Twenty-Five) edit the header in Appearance → Editor. You have two options.

Option 1: the Language Switcher Trigger block (recommended).

1. Go to Appearance → Editor → Patterns → Header (or open a template and click the header).
2. Click the + inserter and search for Language.
3. Add Language Switcher Trigger where you want the button, for example next to the Navigation block.
4. In the block settings on the right, pick a Button style and turn Show chevron arrow on or off. Leave the style on Use global default to follow the Trigger tab.
5. Click Save.

The block supports alignment (left, center, right) and margin and padding from the block toolbar and sidebar.

Style on phones in the block sidebar picks a different style for screens up to the phone width set on the Trigger tab, the same as the menu item’s Mobile Style.

Option 2: a link in the Navigation block.

1. In the Navigation block, add a Custom Link.
2. Type #cls-modal as the URL and any text you like, for example Language.
3. Save.

Clicking that link opens the language window. Unlike in classic menus, the link keeps your text and your theme’s link style; it is not turned into the switcher button. Use option 1 if you want the flag button.