Enhancement: Add French and German Language Taxonomies to Jetpack Search/Sync

### Impacted plugin

Jetpack, Search

### What

I would like to add the following French and German language taxonomies to Jetpack Search

### How

Add the following French taxonomies to Jetpack Search:

1. "metier" (German for "profession" or "job")
2. "métier" (French word equivalent to "profession")
3. "profession"
4. "fonction" (French for "function")
5. "sujet" (French for "theme")

The issue identifies Jetpack Search as the impacted area and lists five French or German taxonomy terms to add. Start by locating the Jetpack Search taxonomy configuration and its related tests; done means Search recognizes all listed terms, including both accented and unaccented forms, with tests covering them.

Written by the indexing model from the issue text.