Aren't the glider badges or certificates under the umbrella of the FAI and pretty much global? eg A, B C then bronze C, silver C , gold C and diamonds? Im a silver C with gold c distance and have glided in Oz and UK. Flight checks are different acronyms in each country and its low aerotow predominantly in Oz and high tow in UK. And no cloud flying in Oz but OK in UK. So need to understand local requirements, radio freqs and etiquette etc. Local gliding club experience and instructor check flights etc seems like the best way. In UK we had visiting Europeans eg from Germany, show their badge and log book have necessary check flights then fly solo. All done at gliding club level. That was 30 years ago when I glided in UK so maybe more paperwork now?