English/Arabic InDesign CC 2018 version 13.0, Arabic txt reverse order in paragraph

Dear Mohammad, I didn't see any screenshot from you so I'm not sure what to suggest as solution. Having said that, these are the common steps you ought to take when inserting Arabic from MS. Word:

• Don't Copy/Paste from MS. Word, instead, open InDesign, go to the File menu and choose place and navigate to the MS. Word document.
• (Optional) In the Place window, click on the "Show Import Options" then click Open, in the Options window, you may choose to "Remove" or "Preserve" formatting from the bottom section, then click OK.
• Once the text is placed in the page, hightlight all to apply an Arabic/Farsi font to the text
• From the Paragraph Panel, make sure you select "Right-to-Left Paragraph Direction" 
• From the Paragraph Panel fly-out menu choose an Adobe World Ready Composer
• From the Character Panel fly-out menu access Keyboard Direction and choose "Default" if possible as it may be dimmed
• From the Character Panel fly-out menu access Character Direction and choose "Default"

Not sure exactly what's going on here, but if it helps, you can install these RTL scripts and change direction for individual characters, paragraphs, etc. https://www.dropbox.com/sh/dzvkg4iv1vsg6tq/AAC_FlxT4qr55lwNrA0QKd5da?dl=0

Have you checked your InDesign Character Panel to make sure that the proper language is selected from the pull-down menu at the bottom? Also check the Advanced Character options in any Paragraph or Character Styles that may exist in your documents to make sure that the correct language is chosen. Any text that doesn't have a character or paragraph style applied may also have to be selected and checked in the Character Panel for the correct language.