The easiest way is the following

1. Format your data as table ( Table name as MY_TEXT)

2. Insert a pivot table and select country as row and region as column

3. Right click the table ( from the field list - "Pivottable fields") and add measure.

4. Create a new DAX formula CONCATENATEX(MY_TEXT,MY_TEXT[MyText])

5. Add the above measure in the value.