German causing trouble in its own group.
Paul Pimsleur refers to 4 FSI categories and the current FSI scale also includes 4 categories. Compared to the five category scale,
German and French each got 4 extra weeks of study time.
Not sure if FSI targets ILR 3 only for consular officers.
Other considerations.
The Defense Language Institute categorizes languages into four levels of difficulty.
"Category I languages, 26-week courses, include Spanish, French, Italian and Portuguese.
Category II, 35 weeks, includes German and Indonesian
Category III, 48 weeks, includes Dari, Persian Farsi, Russian, Uzbek, Hindi, Urdu, Hebrew, Thai, Serbian Croatian, Tagalog, Turkish, Sorani and Kurmanji
Category IV, 64 weeks, includes Arabic, Chinese Mandarin, Korean, Japanese and Pashto
“The expectation is that after 26 weeks in Spanish, you’re going to end up at the same graduation rate as someone who’s here for 64 weeks” studying a Category IV language, said Clare A. Bugary, deputy chief of staff for operations.
She said
91 percent of students at DLI are taking either a Category III or IV language.
DLI also assesses students using the Interagency Language Roundtable (ILR) scale, which bases language proficiency on a scale of 0-5. While Level 5 means someone has a complete fluency of the language, DLI focuses mainly on getting students around Level 2 in overall proficiency.
“Level two to three is typically where our language professionals are,” Bugary said. Common, everyday conversations – even in English – are usually around Level 2..."
https://www.ausa.org/articles/dlis-language-guidelinesFSI vs DLI
At DLI CAT I requires 2 extra weeks, however the target number of class hours for
CAT IV languages was
cut by one third (24 weeks).
Cat III (Russian and co) requires
4 extra weeks compared to FSI.
The target is ILR 2.Another way of looking at it:
The Japanese NAT test targets 1000 study hours to reach the equivalent of JLPT N1. The test doesn't include speaking.
According to my estimates based on some online sources, you can come up with around 1400 hours for HSK 5 (Mandarin). HSK does test speaking. Roughly. Target audience: full time students.