Seal in Chinese / Japanese...

海豹 is the title for a true seal (also known as an earless seal).

海豹部隊 is the title for United States Navy SEALs in Chinese. The U.S. part in implied, as few if any other nations claim to have sailors with the title "navy seals."

Sometimes the term 海豹突击队 (Simplified) or 海豹突擊隊 (Traditional) is also used in Chinese. It means "Seal Commando Team."

ネイビーシールズ is the title for Navy SEALs in Japanese Katakana (phonetic Japanese for western words).

This is supposed to sound like "navy seals" but does not have any meaning unless the Japanese person who reads it knows what the title is supposed to be.

Note: Because this title is entirely Japanese Katakana, it should be written by a Japanese calligrapher.

心印 is a Buddhist concept that simply stated is "appreciation of truth by meditation."

It's a deep subject, but my understanding is that you can find truth through meditation, and once you've found the truth, you can learn to appreciate it more through further meditation. This title is not commonly used outside of the Buddhist community (your Asian friends may or may not understand it). The literal translation would be something like "the mind seal," I've seen this term translated this way from Japanese Buddhist poetry. But apparently, the seal that is stamped deep in your mind is the truth. You just have to meditate to find it.

Soothill defines it this way: Mental impression, intuitive certainty; the mind is the Buddha-mind in all, which can seal or assure the truth; the term indicates the intuitive method of the Chan (Zen) school, which was independent of the spoken or written word.

Reference: Soothill-Hodous Dictionary of Chinese Buddhism

See Also:  Zen