Trados Studio is able to check spelling using Word spelling engine
In Trados Studio, please select File > Options. Options dialog window appears:
(The screenshot is made in Trados Studio 2014, but the process in the higher versions is similar.)
Select Editor on the left pane > click Spelling in the list of items that appears.
In the pop-up list Active Spell Checker on the right, please choose MS Word Spell Checker.
We advise to set the check box Check spelling as you type, so Trados Studio will underline spelling errors with red immediately after typing a word. Lower, you can specify whether spelling errors in locked segments, 100% matches and CM/PM matches are to be ignored.