Club Armour doesn't require Japanese skills. It's a mat-specialized shop. Consider it as a soapland without FS. But if you looking for GFE, herusu shops are probably your best shot, but as far as I know, most herusu shops in Osaka require you to speak at least conversational Japanese.
Last time I was in Osaka, I tried one of the やんちゃな子猫 shops. It claims to be the largest herusu chain in Kansai area. Staff was friendly and all girls are available to foreigners. I don't know if you can get in speaking only English, but you may want to give it a try.