Answer:
The sentence that we must complete is:
"Quien _________ dos lenguas vale por dos."
A rough translation of this is:
"Who ____ two languajes, is worth for two"
The word that can complete the sentence is "speak" or "habla" in Spanish, the complete sentence is:
Quien habla dos lenguas vale por dos.
I would say Panama, Guinea is also smaller in population but not sure about the language.
My Hat, Your Hat: Understanding Possessive Adjectives
Singular Noun Plural Noun Translation
mi mis my
tu tus your (familiar)
su sus their, your, his, her , its
nuestro/a nuestros/as our