What is the English translation of the French word 'quel'?
"That" is an English equivalent of the French word quel.
Specifically, the word is the masculine singular form of an indefinite adjective. The feminine singular form is quelle. The pronunciation will be "kehl" in French.
How old are you is an English eqiuvalent of 'Quel age as-tu'. The words in French are pronounced 'keh-lah-zhah-too'. In the word by word translation, the masculine interrogative 'quel' means 'which'. The masculine gender noun 'age' means 'age'. The verb 'as' means '[you] are having, do have, have'. The personal pronoun 'tu' means 'you'.