Double Translation File

Hello Vibe, Some questions about translation. I had some difficulties when translating WPLMS Theme (not plugin) with loco translate. Some strings was not translated. I translated English United States because Indonesian not provided and only need user front-end to be translated, not my back-end. When some strings on WPLMS Theme was not translated, I checked in public_html/wp-content/languages/themes. It was blank. So I copied two files of WPLMS Theme I have translated: vibe-en_US.po and vibe-en_US.mo to that folder. I did it with FTP. Then I checked my back-end to Loco/Themes/WPLMS, there are 2 English United States translation. I scyned the lastest file (folder: system) and translation works! http://prntscr.com/hmb25s   But, I am experiencing page speed slow down after that Sync. I am not sure if it is because of double translation or not. So here is my questions: 1. I have 2 English translation files in Themes / WPLMS. Is there something I have to worried about this? Is it slowing down my website? Should I delete  the old file? (folder: author)   2. All of my plugin translation not stored in wp-content/languages/plugins folder. That folder only contains Woocommerce translation file (I have no idea how they could stored there). But my plugin translation is fine and sync correctly. So, should I copy my translation file (.po/.mo) to wp-content/languages/plugins folder?   I put credential below if you need some checks. Thank you!