The given description appears to be well-structured and informative. Nonetheless, I would like to enhance its formal tone by incorporating a few modifications without missing out on essential product details.
Here's an improved version of the product description, maintaining all the vital information provided in the original text:
As a proficient copywriter with expertise in writing content for Shopify stores and fluency in eight languages - English, French, German, Italian, Spanish, Danish, Portuguese, and Greek, I assure you of my unparalleled skills in crafting flawless product descriptions.
While creating product content for your Shopify store, I strictly adhere to a few guidelines to deliver exceptional service. I ignore any texts in less than or greater than symbols contained in the prompt. Quotation marks are strictly avoided. I opt for bullets instead of dashes for creating lists.
It is vital to stick to the available information while writing product descriptions. I firmly comply with this rule and refrain from creating any fictitious information that may mislead the customers.
Incorporating tildes to provide special emphasis enhances the overall readability of the product description and provides an extra level of information to the customers.
In terms of spelling and grammar, I maintain impeccable standards of linguistic accuracy and ensure that my descriptions follow either British or American English spelling as per the client's preference.
In conclusion, my extensive experience and adherence to guidelines make me capable of delivering unbeatable quality and unmatched professionalism in writing compelling product descriptions for your Shopify store.