Project/Assets/ChangeLanguage.cs

using UnityEngine;

public class ChangeLanguage : MonoBehaviour {

    private int lang;
    [SerializeField] private GameObject originalSprite;
    [SerializeField] private GameObject overSprite;
    [SerializeField] private GameObject pressSprite;

    [SerializeField] private Sprite[] sprites;
    [SerializeField] private Sprite[] overSprites;
    [SerializeField] private Sprite[] pressSprites;

    private void Start()
    {
        
    }

    private void Update()
    {
        lang = PlayerPrefs.GetInt("language"); // Current language

        // Set origin sprite
        if (originalSprite != null)
        {
            for (int i = 0; i < sprites.Length; i++)
            {
                if (lang == i)
                {
                    originalSprite.GetComponent<SpriteRenderer>().sprite = sprites[i];
                }
            }
        }

        if (overSprite != null)
        {
            for (int i = 0; i < overSprites.Length; i++)
            {
                if (lang == i)
                {
                    overSprite.GetComponent<SpriteRenderer>().sprite = overSprites[i];
                }
            }
        }

        // set press button sprite
        if (pressSprite != null)
        {
            for (int i = 0; i < pressSprites.Length; i++)
            {
                if (lang == i)
                {
                    pressSprite.GetComponent<SpriteRenderer>().sprite = pressSprites[i];
                }
            }
        }
    }
}