In English, there are many ways to express gratitude and appreciation without using the word 'thank you'. Here are a few examples:

1. 'I appreciate it.' - This phrase is a simple and straightforward way to express gratitude. It can be used in a variety of situations, such as when someone does you a favor or helps you out.

2. 'That was very kind of you.' - This is a more formal way to express gratitude, and is often used in situations where someone has gone above and beyond to help you.

3. 'I'm grateful for your help.' - This is a more personal way to express gratitude, and can be used when someone has helped you through a difficult time or provided emotional support.

4. 'I owe you one.' - This phrase is often used when someone has done you a favor and you want to let them know that you will return the favor in the future.

5. 'You're a lifesaver!' - This is a more informal way to express gratitude, and is often used when someone has helped you out of a difficult situation.

Overall, there are many ways to express gratitude and appreciation in English, and using a variety of phrases can help to create a more nuanced and meaningful expression of thanks. So the next time you want to say 'thank you', consider using one of these alternative phrases instead!