refactor: fix phpdoc and improve code in `Language` #13465

Job	Run time
Setup PHP Version for Code Coverage	4s
Others (8.2) / Sanity Tests	3m 41s
Others (8.3) / Sanity Tests	2m 25s
Others (8.1) / Sanity Tests	2m 43s
Others (8.4) / Sanity Tests	2m 47s
SeparateProcess (8.1) / tests	4m 3s
SeparateProcess (8.2) / tests	3m 27s
SeparateProcess (8.3) / tests	3m 54s
SeparateProcess (8.4) / tests	3m 42s
DatabaseLive (8.1, OCI8, 8.0) / tests	6m 27s
DatabaseLive (8.2, OCI8, 8.0) / tests	6m 31s
DatabaseLive (8.2, Postgre, 8.0) / tests	3m 30s
DatabaseLive (8.2, SQLite3, 8.0) / tests	3m 33s
DatabaseLive (8.3, OCI8, 8.0) / tests	6m 31s
DatabaseLive (8.4, MySQLi, 8.0) / tests	4m 38s
DatabaseLive (8.4, OCI8, 8.0) / tests	6m 24s
DatabaseLive (8.4, SQLite3, 8.0) / tests	2m 55s
DatabaseLive (8.1, MySQLi, 8.0) / tests	4m 9s
DatabaseLive (8.3, SQLite3, 8.0) / tests	2m 52s
DatabaseLive (8.3, SQLSRV, 8.0) / tests	3m 15s
DatabaseLive (8.4, Postgre, 8.0) / tests	3m 7s
DatabaseLive (8.1, MySQLi, 5.7) / tests	3m 13s
DatabaseLive (8.1, Postgre, 8.0) / tests	2m 30s
DatabaseLive (8.2, SQLSRV, 8.0) / tests	5m 37s
DatabaseLive (8.1, SQLSRV, 8.0) / tests	5m 53s
DatabaseLive (8.3, MySQLi, 8.0) / tests	5m 7s
DatabaseLive (8.3, Postgre, 8.0) / tests	2m 54s
DatabaseLive (8.1, SQLite3, 8.0) / tests	2m 39s
DatabaseLive (8.4, SQLSRV, 8.0) / tests	4m 1s
DatabaseLive (8.2, MySQLi, 8.0) / tests	2m 44s
CacheLive (8.3) / Cache Live Tests	2m 18s
CacheLive (8.4) / Cache Live Tests	2m 4s
CacheLive (8.1) / Cache Live Tests	2m 7s
CacheLive (8.2) / Cache Live Tests	2m 29s
Upload coverage results to Coveralls	-1s
	2h 4m 13s

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