App Store language does not match iPhone language

Hello Iannis82,

We would like to see how we can help you with changing your Apple ID region. The only way to change the language in the App Store, will be by changing to your region with the steps in this link: Change your Apple ID country or region - Apple Support

"Use your iPhone or iPad to change your region

1. Open the Settings app. 
2. Tap your name, then tap Media & Purchases.
3. Tap View Account. You might be asked to sign in.
4. Tap Country/Region.
5. 
6. 
   
7. Tap Change Country or Region.
8. Tap your new country or region, then review the Terms & Conditions.
9. Tap Agree in the upper-right corner, then tap Agree again to confirm.
10. Select a payment method and enter your new payment information and billing address, then tap Next. You must enter a valid payment method for your new country or region.*

Use your computer to change your region

1. Open the Music app or iTunes.
2. In the menu bar at the top of the screen or the top of the iTunes window, click Account, then click View My Account or Account Settings.
3. Sign in with your Apple ID.
4. On the Account Information page, click Change Country or Region.
5. 
6. 
   
7. Select your new country or region.
8. Review the Terms & Conditions, then click Agree. Click Agree again to confirm.
9. Enter your new payment information* and billing address, then click Continue.

Change your region online

1. Sign in to appleid.apple.com.
2. Tap or click Personal Information.
3. Tap or click Country/Region.
4. Follow the onscreen instructions. You must enter a valid payment method for your new country or region.*"

Cheers!