ご参考になれば。
Masako Sato
I don't know of any official katakana rendering conventions for Spanish, but this should be relatively straightforward as Spanish is a very vowel-heavy language that corresponds well with a syllabary, and has few sounds unrenderable in katakana.Notable exceptions would be the "thetheo" of Castillian Spanish, the "kh" of some dialects, and the rolled "r" as in "perro", not to mention many minimal pairs in which "l" and "r" must be differentiated.