How to find all image objects with multi-language set to it, using ishremote?

I'm trying to use ishremote to FIND all images objects in TridionDocs, which the field DOC-LANGUAGE's value is multiple value (e.g. "zh_CN, en_US, es") rather than single value (e.g. "zh_CN").

If I use Set-IshMetadataFilterField -Name 'DOC-LANGUAGE'-level 'Lng' -ValueType 'Value' -FilterOperator 'In' -Value 'zh_CN, en_US, es', the image object with single language value will also be returned, which is not expected.

Due to we now have a large quantity of image objects with multivalue DOC-LANGUAGE, fetch the whole image objects then inspect every object's  DOC-LANGUAGE property, is actually time-consuming.

Is there any good advices on composing powershell scripts?

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