I'm curious what certificate do you think you would need in Puerto Rico, which is basically the 51st State?
You are a CFI who doesn't know that English is the standard, and probably is in
PR?
Lay off the Starbucks and whatever other mind altering stuff they have up there in the Pac NW.
I'm not into the 'greenery' up in the Northwest, but I will say I'm a heavy coffee drinker...
Of course English would be standard, I merely asked as if not being bilingual would present a 'bias' in hiring. In my experience, instructing non-native speakers poses challenges that might be overcome if communication is facilitated in the native-tongue.
As for my Spanish, I can order a burrito and a modelo.