What should I do if the words on the keyboard of my mobile phone are replaced by those in calligraphy?

It can be changed in the display of mobile phone settings.

Click the font style in the display, find the font style you like, click Input, and then click Download. After downloading, click "Apply" to complete font replacement. This is the style after changing the font. To change back to the original font, we can select the first font in the click font style settings, and then click Apply in the pop-up page.