[TRANSLATIONS] Invalid translations/en.json: Invalid translation key '0: Tram', need to be [a-z0-9-_]+ and cannot start or end with a hyphen or underscore. for dictionary value @ data['selector']['route_type']['options']. Got {'0: Tram': 'Tram, Streetcar, Light rail.', '1: Metro': 'Subway, Metro. Any underground rail system', '2: Rail': 'Rail, intercity or long-distance travel', '3: Bus': 'Bus, short- and long-distance bus routes', '4: Ferry': 'Ferries, short- and long-distance boat service', '99: All': 'All, this includes also more obscure ones not in above'}