The Defense Language Institute in Monterey has been doing this for decades, 22 languages including Arabic. Most of the programs are about a year. A friend - 100 percent American - trained in Russian there and became a translator.
NSA certainly has a wealth of trained analysts and translators who hold clearance.
So why is the FBI hiring security risks rather than training cleared personnel?
More unbelieveable incompetence in the management ranks at the agency.
They have already hired and cleared them. They are in the agencies. They have different sets of biases. They get away with what they are allowed to get away with.