Since the program is created by a Chinese developer, it often defaults to Chinese. To switch it to English: Open the program. Look for a button or checkbox labeled "Change Language" on the main interface.
Sscom V5.13.1 English: The Ultimate Serial Port Debugging Tool Sscom V5.13.1 English
Type your data in the send window and click "Send". Incoming data will populate the large top terminal. Since the program is created by a Chinese