German: The "ö" is pronounced like the "e" in "fern" or "word," with your tongue slightly raised in the front of your mouth.
Swedish: The "ö" is pronounced very similarly to the German pronunciation, but with a slightly more open mouth.
Finnish: The "ö" is pronounced similarly to the German pronunciation, but with a slightly more rounded mouth.
Turkish: The "ö" is pronounced like the "u" in "put" or "good."
Other Languages: In some other languages, the "ö" may be pronounced as a short "o" sound or with a slightly different vowel quality.
If you're unsure about the pronunciation of "ö" in a specific word, you can always consult a dictionary or online pronunciation guide.