[BUGFIX] Use English labels if browser's preferred language is English

Change-Id: Ic9cb3f3e3e0547e4a0d34bf50f481e2f3844f610
Resolves: #80593
Releases: master, 7.6
Reviewed-on: https://review.typo3.org/52280


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Thomas Hohn <thomas@hohn.dk>
Reviewed-by: Markus Klein <markus.klein@typo3.org>
Reviewed-by: Joerg Boesche <typo3@joergboesche.de>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Daniel Goerz <ervaude@gmail.com>
Tested-by: Daniel Goerz <ervaude@gmail.com>
Reviewed-by: Xavier Perseguers <xavier@typo3.org>
Tested-by: Xavier Perseguers <xavier@typo3.org>