Re: Articulation disorders in speakers of your native language
In Cyprus articulation disorders are treated in primary schools.
I remember endless hours of practicing the /s/ sound (and therefore /ks/ and /ps/ which are regarded phonemes on their own in Greek) which I pronounced as /θ/, and the dreaded /r/ (trilled r) sound, which I still can not pronounce (I say something close to /ɻ/, an approximant, which is slightly more acceptable than the /ʁ/ I used to pronounce).
My mother also says I used to pronounce /ʎ/ as /j/, but I don't remember such a thing :S
My username is pronounced /ði'mitris/, romanized Dimitris, cyrillicized Димитрис and katakanized ディミトリス.