To create an email that is in French with a toggle to view in English, you just name the blocks the same, with the exception of the final two characters that denote the language. For example, if you have an offer block in French, you could have two block names that are identical except for the language identifier like this:
FTA.E1.P102.2025.05.V1.FR and FTA.E1.P102.2025.05.V1.EN
The header block (A block) in the matrix for the French email must contain this code:
<a href=”[SHOWEMAIL]?display_language=en” target=”_blank” style=”text-decoration: underline; color: #282829;”>View in English</a> <a href=”[SHOWEMAIL]” target=”_blank” style=”text-decoration: underline; color: #282829;”>Voir en ligne</a>
This controls the language toggle link at the top of the email so the recipient can view the English version of the email.