German and Arabic course, or German, Arabic and Russian?

Arabic will be more useful

Do you reckon three would severely limit the breadth of knowledge, or proportionately impede ability/level of fluency?

Arabic will be more useful

tl;dr: Should I do a German or Arabic course, or German, Arabic and Russian, considering whether I would reach a reasonable fluency in all three by the end or not? Would doing three languages still jeopardise a reasonable fluency?

I'm definitely doing German and another language, that's non-negotiable.
I was initially more attracted into doing Russian than Arabic, but recently that has taken a massive turn, and I'm far more interested in doing Arabic.

I could always try do all three.

What are your thoughts on doing three language, instead of two? Do you still think I can reach a sufficient level in all three? I'd be starting two new languages at the same time (the Arabic and Russian), and what are your thoughts about the breadth of knowledge gained?

I was going to learn Russian and Arabic, but decided that Arabic really is a bit of a pandora's box in terms of which Arabic to learn, and the distinction between classical Arabic and the various Arabics spoken in different states.

I decided to learn Hebrew and Russian. I'd love someone to practice the Ruski with? Out of interest, are you considering.. ahem.. government service?

Not entirely. The thing is, there is as more difference between Syrian Arabic and Yemeni Arabic as there is between French and Spanish. They are basically different languages.

By learning Arabic, you are essentially learning classical Arabic which is the language of religion.

I don't think you should look at what language would be more useful to learn, because you can always learn a language outside of university. Personally, I'd say that if you only choose to do 2 languages then you will be more fluent in them in comparison to learning 3. Re-think why you changed your mind and now prefer Arabic than Russian, and remember that when you learn a language at university you also take modules in history, politics, literature etc.

I'm applying for History and Russian, I was debating whether to choose Russian or German, but since Russian is what I think I will enjoy more I chose to do that. I too changed my mind as I wanted to do German at first, but the thing is the only thing which attracts me to German history is unfortunately the Third Reich only, whereas I like many aspects of Russian history ranging from the tsars to ... well ... Putin. I also find the Russian language more fascinating, especially the alphabet. . After looking at a few beginners language youtube videos and getting a taste of each language, and taking into consideration the history aspect of the courses, I decided that Russian is more for me.

It's more about would doing three jeopardise my end fluency severely? Like enough to not do it? 'Cos I want to learn all three in the end, but is it practical to learn all three at once?

No, well not at the moment anyway.

I've wanted to be a foreign correspondent (a reporter/journalist.)
Then as a back up, I can always go into translation, or (though perhaps unlikely) go into politics. Translation the practical back up, politics the aspirational back up.