Loan words- A word borrowed from a donor language that is incorporated into the recipient language without translation. Ex: mosquito.
The abbreviations of the spanish words señora, señora, señorita, and usted are always uppercase. Ex: Sr., Sra., Srta., Ud. The actual words themselves are always lowercase unless they begin a sentence then they're uppercase.
When you're talking about the person, use "el" or "la" before señora, señora, and señorita.
The difference between tú and usted is very slight, but there is a difference. They have the same meaning, they both mean "you", but usted is used for formal situations while tú is used for every other situation.
When writing the days of the week or the months of the year, don't capitalize them unless they're the beginning of a sentence.
The way dates are written in spanish is day/month, as opposed to in english we use month/day. Spanish Ex: 1/3 = The 1st of March, English Ex: 3/1 = The 1st of March.
When talking about dates that involve the number 1, use "primero" instead of the normal way to say 1 which is "uno."