fix can't change report language in new renderjs ui

See merge request !1516
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Status Job ID Name Coverage
  External
passed ERP5.CodingStyleTest-Master

00:52:53

failed ERP5.PerformanceTest-Master

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failed ERP5.UnitTest-Master

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failed ERP5.UnitTest-Master.Medusa

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passed SlapOS.Eggs.UnitTest-Master.Python2

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passed SlapOS.Eggs.UnitTest-Master.Python3

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