[5.1] Fix Fontend language multilingual without compatibility plugin

[bembelimen]

Summary of Changes

Fix wrong field name for multilingual sites in user profile

Testing Instructions

• Disable the "Behaviour - Backward Compatibility" plugin
• Enable the "System - Language Filter" plugin
• Check User profile (frontend/backend)

Actual result BEFORE applying this Pull Request

• Language field is a text field

Expected result AFTER applying this Pull Request

• Language field is a select

[brianteeman]

I have tested this item ✅ successfully on a1a927a

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[richard67]

@bembelimen Do you know what this is good for, and is it somehow related to the issue? https://github.com/joomla/joomla-cms/blob/4.4-dev/libraries/src/Form/Field/FrontendlanguageField.php#L26-L32

[dautrich]

I have tested this item ✅ successfully on a1a927a

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[richard67]

RTC

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/43791.}

[bembelimen]

@bembelimen Do you know what this is good for, and is it somehow related to the issue? https://github.com/joomla/joomla-cms/blob/4.4-dev/libraries/src/Form/Field/FrontendlanguageField.php#L26-L32

Should not have any effect on it

[richard67]

@bembelimen Do you know what this is good for, and is it somehow related to the issue? https://github.com/joomla/joomla-cms/blob/4.4-dev/libraries/src/Form/Field/FrontendlanguageField.php#L26-L32

Should not have any effect on it

@bembelimen Should it be changed to public $type = 'Frontendlanguage'; in 6.0-dev so it is like for the other fields? Or should that $type variable be deprecated for all fields because it has no effect at all?

[brianteeman]

@bembelimen Do you know what this is good for, and is it somehow related to the issue? https://github.com/joomla/joomla-cms/blob/4.4-dev/libraries/src/Form/Field/FrontendlanguageField.php#L26-L32

Should not have any effect on it

@bembelimen Should it be changed to public $type = 'Frontendlanguage'; in 6.0-dev so it is like for the other fields? Or should that $type variable be deprecated for all fields because it has no effect at all?

it confused me

[LadySolveig]

Thanks @bembelimen and also for testing and review @brianteeman @dautrich @richard67