Regarding operas
of Moniuszko, let's have a look at the statistics from
http://www.operabase.com, for example the rank of the most performed
composers and the associated language of the last five years:
#1 Verdi Italian (3020 szenical runs)
#2 Mozart German/Italian (2410)
#8 Bizet French (654)
#9 Handel English/Italian (598)
#10 Tchaikovsky Russian (432)
#15 Lehár Hungarian/German (281)
#18 Janáček Czech (209)
#59 Moniuszko Polish (32)
#87 Chapí Spanish (?) (21)
#96 Saariaho Finnish (?) (18)
It seems as if you thought that polish people don't write their own
music...
Sorry to say, but this is utter nonsense. It's a matter of fact that
from an international point of view Poland is not relevant to opera,
as Austria is not relevant to musical, for example. It doesn't
diminish the value of Polish music!