no support for internationalization

[cmungall]

No standard way to specify string literal language (and interoperate with built-in RDF syntax for this)

[althonos]

Regarding this, I think there is nothing in the spec that conflicts with the usage of a language tag the same way they exist in OWL syntaxes: this means that you could have a language tag after quoted and unquoted strings, not inside:

synonym: "nageoire pectorale"@fr EXACT [VSAO:0000147]

to take back the example from #93.

The advantage of this is that it's easier to map to OWL, and the escaping is more obvious: for quoted strings you don't need escaping, for unquoted strings you do, just like for most special characters.