Ordered 50 articles from Jpanese and Chinese freelancers. I want to check if the ariticles are unique. Googled "Plagiarism checker" and other similar terms for whole days long but only discovers some services for English language. I understand the best ideas is to copy some sentences into google or other search engines manutally and check them. but I have too many contents, and more will come . Please advise what to do now. Thank you.