I’m designing a multilingual website using Figma Sites and I’ve set up string variables with multiple modes (for example, en and de) to enable language switching. However, when I try to use the “Set variable mode” interaction in the prototype settings (under the “Add interaction” panel), this option is not appearing or is unavailable in the list.

I've followed the steps to create a variable collection with multiple modes and applied the string variables correctly to my text layers. I'm also on Professional plan, and I believe my plan supports at least two modes.

Could you please let me know:

• Why the “Set variable mode” interaction is not showing up?

• Are there any plan limitations or conditions under which this interaction becomes available in Figma Sites?

• Is there something I might be missing in setup or publishing workflow?

Looking forward to your assistance to resolve this issue.