Back in the days of 1369s, you always had to indicate 'language proficiency', level attained and when it was achieved. So for many years I included 'O' level French, German....and Latin, achieved 1965.
But some oikish wheel opined that this was take the pi$$, so told me that it 'wasn't relevant'. Pratt....
Not a bad idea to have a second language at conversational level - but is some senior pongo going to decide which languages are acceptable? And how will they assess whether Captain ffanshawe-Smythe's claim to speak fluent Klingon is actually valid?