Setup Login as admin. Access to "Site administration / H5P / Manage H5P content types" and upload the chart.h5p attached file as H5P content types. Check the "Chart" library is displayed in the "Installed H5P content types" tab. Download the test_editor.php  file attached and put it into the root folder. Access to "Site administration / Language / Language packs" and install "Català (ca)" and "Español - Internacional (es)" language packs. Go to "Site administration / Language / Language customisation" and customise the following string in the "English (en)" language pack (you will need to "Open language pack for editing" and then search the following string in h5plib_v124.php component): editor:pasteandreplacebutton: Paste & Replace - ENGLISH from h5plib_v124 Go to "Site administration / Language / Language customisation" and customise the following strings in the "Català (ca)" language pack (you will need to "Open language pack for editing" and then search the following strings in h5plib_v124.php component): editor:pasteandreplacebutton: Paste & Replace - CATALAN from h5plib_v124 editor:metadata: Metadata - CATALAN from h5plib_v124 Open the file "h5p/h5plib/v124/joubel/editor/language/es.js" and edit the following strings (" - SPANISH from JS" has been added at the end of the original value): metadata: 'Metadata - SPANISH from JS', pasteAndReplaceButton: 'Pegar y Reemplazar - SPANISH from JS',   Testing scenario 1: English Load https:// yoursite /test_editor.php. In the "Select a content to create" dropdown, choose the option "Chart" and click the "Create" button. Check the editor is displayed. Check all the strings are displayed in English. Check the "Paste & Replace" button next to "Copy" (at the right top of the editor), contains the text "Paste & Replace - ENGLISH from h5plib_v124". Testing scenario 2: Language from Moodle strings for a language without JS file Go to the Dashboard. Select "Català (ca)" as the default language (using the dropdown in the header, next to the Moodle site name). Load https:// yoursite /test_editor.php. In the "Select a content to create" dropdown, choose the option "Chart" and click the "Create" button. Check the editor is displayed. Check the "Paste & Replace" button next to "Copy" (at the right top of the editor), contains the text "Paste & Replace - CATALAN from h5plib_v124". Check the "Metadata" button near "Title" contains the text "Metadata - CATALAN from h5plib_v124". Testing scenario 3: Language from JS or Moodle strings for a language with JS file Go to the Dashboard. Select "Español - Internacional (es)" as the default language (using the dropdown in the header, next to the Moodle site name). Load https:// yoursite /test_editor.php. In the "Select a content to create" dropdown, choose the option "Chart" and click the "Create" button. Check the editor is displayed. Check the "Paste & Replace" button next to "Copy" (at the right top of the editor), contains the text "Pegar y Reemplazar - SPANISH from JS". Check the "Metadata" button near "Title" contains the text "Metadata - SPANISH from JS". Go to "Site administration / Language / Language customisation" and customise the following string in the "Español - Internacional (es)" language pack (you will need to "Open language pack for editing" and then search the following strings in h5plib_v124.php component): editor:metadata: Metadata - SPANISH from h5plib_v124 Load https:// yoursite /test_editor.php. In the "Select a content to create" dropdown, choose the option "Chart" and click the "Create" button. Check the editor is displayed. Check the "Paste & Replace" button next to "Copy" (at the right top of the editor) still contains the text "Pegar y Reemplazar - SPANISH from JS". Check the "Metadata" button near "Title" now contains the text "Metadata - SPANISH from h5plib_v124".