I easily made these corrections/changes using the Language Manager > overrides. But perhaps the changes can be made in the next VM update. Spelling source Merriam-Webster. Thanks!
en-GB.com_virtuemart.ini
116 COM_VIRTUEMART_CHECKOUT_PLEASE_ENTER_ADDRESS="Please enter your billto address"
bill-to
145 ; THis is not valid joomla 1.7 !!!
; This is not valid Joomla 1.7 !!!
156 COM_VIRTUEMART_EMAIL="Email"
E-mail
161 COM_VIRTUEMART_ENTER_A_VALID_EMAIL_ADDRESS="Please enter a valid e-mail address"
209 COM_VIRTUEMART_MIGRATION_WARN_VM1_EXTENSIONS="Attention: You have still old vm extensions in your joomla installation active, uninstall or disable them"
Attention: You have still old vm extensions in your Joomla installation active. Uninstall or disable them."
283 COM_VIRTUEMART_PRODUCT_FORM_CALCULATE_PRICE_FINAL_TIP="Check this to calculate the costprice with the desired final price"
cost price
314 COM_VIRTUEMART_PRODUCT_SALESPRICE_WITH_DISCOUNT="Salesprice with discount: "
Sales price
389 COM_VIRTUEMART_SEARCH_ORDER_PRODUCT_HEIGHT="Product Heigth"
Height
NOTE: I realize Great Britain spellings are used, just be consistent. All GB or not.
451 COM_VIRTUEMART_UNIT_NAME_CM="Centimetres"
Centimeters
454 COM_VIRTUEMART_UNIT_NAME_G="Gramme"
Gram
456 COM_VIRTUEMART_UNIT_NAME_KG="Kilogramme"
Kilogram
459 COM_VIRTUEMART_UNIT_NAME_M="Metres"
Meters
460 COM_VIRTUEMART_UNIT_NAME_MG="Milligramme"
Milligram
461 COM_VIRTUEMART_UNIT_NAME_MM="Millimetres"
Millimeters
509 COM_VIRTUEMART_USER_FORM_RECEIVESYSTEMEMAILS="Receive System Emails"
E-mails
512 COM_VIRTUEMART_USER_FORM_ST_SAME_AS_BT="Use for the ship-to same as bill-to address"
543 COM_VIRTUEMART_YOUR_LOGINAME="Your Login Name: "
Log in
en-GB.com_virtuemart.sys.ini
54 COM_VIRTUEMART_PRODUCTDETAILS_FIELD_SELECT_DESC="Creates a link to this display the selected Product"
"Creates a link to display the selected Product"
en-GB.com_virtuemart_shoppers.ini
20 COM_VIRTUEMART_SHOPPER_FORM_EMAIL="Email"
E-mail
26 COM_VIRTUEMART_SHOPPER_FORM_GROUP_PRODUCT_TIP="If one or more shopper group(s) is/are selected, the product will be displayed only to those shopper groups. If no shopper group is selected, the product is displayed to all shopper group."
displayed to all shopper groups."
I'll correct the typos - thanks for the information.
However, it looks like you are American, while VM2 is supplied with british English (en-GB). The U.S. 'liter' for example is written 'litre' in the U.K.
Have a look for example here: http://dictionary.cambridge.org/dictionary/british/litre?q=litre (allows to switch between U.K. and U.S. English)
But you are more than welcome to join the U.S. language team here: https://www.transifex.com/projects/p/virtuemart/language/en_US/
and help to update and maintain the U.S. translation.