Find and replace certain words in a string

Hi everyone,

I have a table with 7 columns and 12000 rows contains learners' survey results. 

One of the columns contains the students' comments (string). These strings may contain one or more lecturers' name.

I am trying to create a query using M language that allows me to identify the strings with the lectures' name and replace the lecturers' name with the word "Lecturer".

Also, another table includes the list of lecturers' name (1 column, 2000 rows).

I hope it makes sense.

Thank you,

Ata