From my limited reading experience wouldn't this road ลาซาล be pronounced or translated as Laa Saan rather than LA Salle?

Can anyone explain please?

Thanks.

The only thing I can think of, its the Thai spelling of a French word.

Its not a Thai word, the language is littered with Thai spellings of foreign words that make no sense.

Thanks. Could be French then.

It's spelled according to the French spelling, l = ล but an ล at the end of a word will be read as น (n) by Thais.

There is no way for a Thai to pronounce an l at the end of a word. They'll all be pronounced as n.

And just to labour the obvious, the road is named after La Salle School, run by the La Salle Brothers, who were founded by St Jean-Baptiste de La Salle.