Trouble with JText to toggle between languages

[sokrates_mx5]

I'm improving the functions of the JMailAlerts extension and its plugins to better fulfill my needs and to function better on multi-lingual websites. By default the language of the JMailAlerts only change when one change the back-end language of admin, which works for all language the variables.

The original code do not use the $language_tag in $lang->load(); - by adding the $language_tag one should be able to change the language.

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$lang->load('plg_emailalerts_' . $this->_name, JPATH_ADMINISTRATOR, $language_tag);

The strange thing is when using the $language_tag option, then some JText variables change but not all of them. Those JText variables that do not change, do change when one toggle the back-end language of admin.

It doesn't matter if I create new JText varibles and override them with Language Override.

I use three plugins of JmailAlerts (jma_latestnews, jma_latest_post_kunena and jma_latestphoto). The titles of these three plugins to be presented in the MailAlert is generated by the following code:

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<?php echo JText::_($pluginParams->get('plugintitle')); ?>

This code is the same for all three plugins, but just for generating their titles.

The titles do not toggle between the languages for two of them (jma_latestnews and jma_latest_post_kunena), but does it for the third plugin (jma_latestphoto).

If I replace the code in jma_latestphoto with its language variable (<?php //echo JText::_("PLG_JMA_LP_JS_TRANSLATABLE_TITLE"); ?>), then the language does not change either for its title when changing the language of $language_tag.

Other JText language variables do change when one change the language of $language_tag. The following JText language variable do change the language when one change the language of $language_tag.

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<?php echo JText::_("JMA_KUNENA_DATE_CREATED"); ?>

I don't have any idea of what creates this strange and dysfunctional behavior.