Hello @Harjani, Ashish and thanks for sharing your solution. Since accepting your own answer is not supported I'm reposting your solution here so that you can accept and rate it. It will ensure that others facing a similar issue can easily find a solution.
I was able to find the answer. We can change that via customize language snippet mentioned at : https://learn.microsoft.com/en-us/azure/active-directory-b2c/language-customization?pivots=b2c-custom-policy