I lived in Wales for five years before coming here and know the bit about strike a chord and the Welsh start singing. What used to amaze me was how many non-Welsh speakers her the music start and out came the Cymru to the last word of the final chorus. So there must be inherent bilingual traits in the Welsh but now I find myself wondering. Is it new songs rather than old ones? Many of the new singers have discordant voices, are thus terrible singers really, although a few are admittedly fantastic. For some reason Welsh folk do not sing like that. Top of voice, well terribly Welsh, understanding words, oh dear, much of the time one has difficulty doing that in any mother tongue. If you ask nicely at your local pharmacy they might sell pills for it. Mind you, I would tell them that you are singing very loud in German so that they realise it is an ailment. If that doesn't work, since you are already a publisher, launch your own record label, record yourself, have CDs made and get rich!