Ah, I see. I guess my problem is that I don't think it matters, each has advantages:
French is good, as they are our our nearest neighbours and the roots are similar
German teaches us about our own language as English is essentially a dialect of German. Also, as an English and German speaker I can understand a lot of Dutch.
Welsh is beautiful and complex and fascinating.
I could go on, but I don't think it matters where you start, as long as you are taught to speak it well: it opens a new world of literature and cultural understanding, new opportunities and It is excellent for neural development, and once the brain adapts to learning a new language it is easier to learn another (despite this I still haven't learned to speak Japanese)
Again I would not disagree with any of that.
But in the same way that kids in the UK school kids kick back at having to learn Algebra and Geometry as they are "non-functional"* as opposed to (say) learning about domestic finances. Similarly learning (say) German is perceived as "non-functional".
* But, as with the Latin, Algebra and in particular Geometry, were useful in Garden Design
Lay out an octagonal lawn? Lay out one square, overlay with another rotated at 45 degrees, ignore the pointy bit and you have a perfect octagon.
Lay out an ellipse? fix two centres and a loop of string and scribe the perimeter - a perfect ellipse.
Lay out a square? 3-4-5 triangle.
On the other hand, anywhere in the world learning English has an immediate functionality - Socal media, You tube, Games, Music, Cinema, US TV streams, BBC world service, online study aids etc
D1 studied German to GCSE and French to AS level (ie the language part, dropping it for A2 which was more literature IIRC), and enjoyed them both but she was/is academically outstanding (5A's at AS, 4 A's at A2, predating A*)
D2 studied German to GCSE. She is just normally bright.
Both were at selective private schools.