Textareas "Copy text to clipboard" is now translatable.

Thanks to xet7 !

client/components/cards/checklists.jade

@@ -63,7 +63,7 @@ template(name="checklistDeleteDialog")
       button.toggle-delete-checklist-dialog(type="button") {{_ 'cancel'}}
 
 template(name="addChecklistItemForm")
-  a.fa.fa-copy(title="copy text to clipboard")
+  a.fa.fa-copy(title="{{_ 'copy-text-to-clipboard'}}")
   span.copied-tooltip {{_ 'copied'}}
   textarea.js-add-checklist-item(rows='1' autofocus)
   .edit-controls.clearfix
@@ -71,7 +71,7 @@ template(name="addChecklistItemForm")
     a.fa.fa-times-thin.js-close-inlined-form
 
 template(name="editChecklistItemForm")
-  a.fa.fa-copy(title="copy text to clipboard")
+  a.fa.fa-copy(title="{{_ 'copy-text-to-clipboard'}}")
   span.copied-tooltip {{_ 'copied'}}
   textarea.js-edit-checklist-item(rows='1' autofocus dir="auto")
     if $eq type 'item'

i18n/en.i18n.json

@@ -283,6 +283,7 @@
   "confirm-subtask-delete-dialog": "Are you sure you want to delete subtask?",
   "confirm-checklist-delete-dialog": "Are you sure you want to delete checklist?",
   "copy-card-link-to-clipboard": "Copy card link to clipboard",
+  "copy-text-to-clipboard": "Copy text to clipboard",
   "linkCardPopup-title": "Link Card",
   "searchElementPopup-title": "Search",
   "copyCardPopup-title": "Copy Card",