Words in braces like {time} are placeholders and should not be translated. The keys under profileApp.mfa.cooldown are meant to be composed together so that profileApp.mfa.cooldown.lockedRetryIn will read something like "Temporarily locked. Retry in 2 minutes 24 seconds" or "Temporarily locked. Retry in 1 minute 1 second". profileApp.mfa.cooldown.minutesAndSeconds just puts together the appropriate minutes and seconds strings to be inserted where the {time} placeholder is.