In your Gmail account, you can change the default language so it is convenient when working with your emails. For example, the language to search or compose an email.
Step 1: Login your Gmail account (please refer here to open one if you do not have an account yet);
Step 2: In the Gmail account, click the triangle right after the "Input tool" button on the right-top corner;
Step 3: Select the language from the drop-down list. If you cannot find the language, click the "Input Tools Settings" at the bottom;
Step 4: In the next window, select the language from the box on the left, and click the arrow in the middle to move to the box on the right;
You can use the arrows on the right to move the language up or down.
Step 5: To use a language, click the language from the list;
Step 6: When you search or compose an email, the language will become the one you just selected.