Samsung Galaxy S5 using Android kitkat Android 4.4, which of course there are differences in menu layout, appearance and others compared with previous versions.
Intentional or unintentional, for example, the language changes to a language you do not understand, for example, to Russian, Vietnamese or Chinese, if you are not familiar with the menus it would be difficult to return to the language you want.
To enter the language setting menu / setting language on Samsung Galaxy S5 (or on other devices) we can see from other devices that use language that we understand. We can see the icon form to enter the menus we want.
If in your place there is no comparison to see the menu for language setting, here I show capture to enter the language setting Samsung Galaxy S5
Tap on the Apps icon
Intentional or unintentional, for example, the language changes to a language you do not understand, for example, to Russian, Vietnamese or Chinese, if you are not familiar with the menus it would be difficult to return to the language you want.
To enter the language setting menu / setting language on Samsung Galaxy S5 (or on other devices) we can see from other devices that use language that we understand. We can see the icon form to enter the menus we want.
If in your place there is no comparison to see the menu for language setting, here I show capture to enter the language setting Samsung Galaxy S5
Tap on the Apps icon
Then select Settings icon
Select on the menu that is in the sequence to the top 3 (Sound and Display)
A icon is to enter the language menu
Choose the language you want