Please modify the language XML files.
For example, in the en-en.xml.
...........
<resource name="Bold">Bold</resource>
<resource name="Italic">Italic</resource>
<resource name="Underline">Underline</resource>
<resource name="JustifyLeft">Left Justify</resource>
<resource name="JustifyCenter">Center</resource>
<resource name="JustifyRight">Right Justify</resource>
<resource name="ForeColor">Font Color</resource>
<resource name="SetForeColor">Set Font Color</resource>
...........
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