Cross Browser dataset
Dataset is the method of applying and accessing custom data to elements.
This feature is already supported by a few major browsers including Chrome, Firefox, Internet Explorer 11, Microsoft Edge, and Opera.
You can use dataset like this:
<p>The third <span data-mytrans-de="Anspruch">claim</span> covers the case of <span translate="no">HTML</span> markup.</p>
More information can be found here.