Few questions about kws in wordpress and duplicate content

I'm finally going to start website in my favorite niche, not only in english, but in native language too. For english website, i'll probably need to do a lot of backlinking and for my native language i might be able to rank with just a content. So i want to ask, lets say my site niche is forex and the domain has forex in it, should i put forex in kw in every article if it is mention in that article, or i should put it to only one good article and as a homepage kw and as kws for my articles use some "make money with...." long tails?
I know if i put forex kw in every article, my pages will compete with each other, but is that such a bad thing? Wouldn't it help rank my homepage?

Another question, how many kws is too much for homepage? And i have also problem with wordpress (i use ALL IN SEO) if i set 10 posts on homepage, my other homepage pages don't have meta tags etc.. how to fix that?

I want to publish the same articles with same photos, but different yt videos on both sites, is that going to be problem? I will translate it my self, but the text is going to have the same structure, same photos and targeting same or similiar kws, but in different language...

Also after my article is ranked lets say on the first page and i change embed youtube video in it (that will be all), is that going to hurt my rankings? if yes, would it be permanent or just temporary?

Thx for help in advance.

Google recommends to use only 5 keywords.


Long tail keywords are best.

Yes same text and same photo is a problem.

Don't overuse the keyword, google can penalised you!

Regards

I know if i put forex kw in every article, my pages will compete with each other, but is that such a bad thing? Wouldn't it help rank my homepage?

Click to expand...

The Site where u backlinks are pointing will rank. So most of the time the homepage will rank. The articles will only rank for the optimzed longtails and even than if ur homepage is only a little bit optimized for them (one time the kyword), the homepage will outrank them (if ur homepage get all the backlinks).

Long tail keywords are good and use only unique contents.

Go for long tail keywords and use upto five keywords

SEO FOX said:

Long tail keywords are good and use only unique contents.

Click to expand...

So if i write unique content for my English website and then translate it and rewrite it into my native language, it won't be unique?

Does anyone knows the answer for that youtube thing i aksed?
Btw: if i pass this smallseotools.com/plagiarism-checker/ 100%, am i allright, or this tool is not reliable?

I checked my content via those four tools:
http://smallseotools.com/plagiarism-checker/
http://www.duplichecker.com/
http://plagiarisma.net/
http://solidseotools.com/plagiarism-checker

But it is kind of vaste of time to check it via 4 tools, does anyone of you have expirience with some of those tools? Which one i should trust that my content is 100% unique.. Does it have to be 100%?

From what I've read, it's not a good idea to use the same structure, photos, videos etc. Honestly the only way anyone could give a definitive answer though is if they've tried it themselves, and probably alot of people only work with one language. Don't overuse your main keywords - over optimization is a sure way to get penalised.

there are tons of the plagiarism detection tools are available on the Google that can be used for such purpose. You can try out the Copyscape, Small seo tools, SEO tools Centre and many other tools for such purpose.
Here is the useful plagiarism tools list for such purpose.
http://smallseotools.com/plagiarism-checker/
http://www.duplichecker.com/
http://plagiarisma.net/
http://solidseotools.com/plagiarism-checker
seotoolscentre.com/plagiarism-checker-tool
seometer.net/online-plagiarism-checker

And hope these tools will work fine for you.