Refactor use of xml:lang attribute #1162

Job	Run time
Quality control	32s
Security checks	14s
Linter / json-linter	23s
Linter / yaml-linter	5s
PHP-Linter (8.1) / linter	20s
PHP-Linter (8.2) / linter	26s
PHP-Linter (8.3) / linter	15s
PHP-Linter (8.4) / linter	10s
Linter / style-linter	0s
Linter / ecmascript-linter	0s
Unit tests, PHP 8.2, windows-latest	47s
Unit tests, PHP 8.4, windows-latest	49s
Unit tests, PHP 8.2, ubuntu-latest	13s
Unit tests, PHP 8.3, windows-latest	43s
Unit tests, PHP 8.1, windows-latest	42s
Unit tests, PHP 8.1, ubuntu-latest	24s
Unit tests, PHP 8.3, ubuntu-latest	18s
Unit tests, PHP 8.4, ubuntu-latest	23s
Code coverage	8s
Cleanup artifacts	3s
	6m 55s

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